atmel_pwm: set up only one PWM clock when allocating a clock

This patch will only setup one clock, if free, and return this clock to the
caller.  The previous solution would setup both clocks with the same prescaler
and divider and return PWM_CPR_CLKB, thus taking both clocks in the same call
without the caller knowing.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/misc/atmel_pwm.c b/drivers/misc/atmel_pwm.c
index 5b5a14dab3d38d5e77a26381f849d2e26822934c..6aa5294dfec4fc681305b03a63c1f8e63aecf0ee 100644 (file)
--- a/drivers/misc/atmel_pwm.c
+++ b/drivers/misc/atmel_pwm.c
@@ -211,8 +211,7 @@ int pwm_clk_alloc(unsigned prescale, unsigned div)
        if ((mr & 0xffff) == 0) {
                mr |= val;
                ret = PWM_CPR_CLKA;
-       }
-       if ((mr & (0xffff << 16)) == 0) {
+       } else if ((mr & (0xffff << 16)) == 0) {
                mr |= val << 16;
                ret = PWM_CPR_CLKB;
        }